Listen carefully what Cernan is saying after 8:00 mins of video. You think it may be a slip!!! I doubt it.

Despite the fact that there's no physical evidence that corroborates the claims of Al Bielek, Preston Nichols, Andrew Basiago and Laura M. Eisenhower, that US military has developed secret programs on space-time travel, since the '40s, I consider this video, a smoking-gun whistleblow 'cause the persons you will hear and see now, have done astonishing revealings about this subject.